Four categories of change have their own keywords and their own sections on this page: curses, stores, new combat and monster ai. There is also a debate to be had around reducing the information available to the player, with the aim of making them work harder for stuff. We have already hidden non-standard damage dice until a weapon is picked up. We could also hide the exact flavour of potions and scrolls which are outside LOS (one of Timo's f-k-was-better issues). We could also make object detection fail to reveal items in vaults until @ is inside. Etc. Needs more thinking.